Caterpillar Tractor Co.

Lowell P Iverson

Paul Douglas Hagen

George W Dirscherl

A pivot pin assembly for mounting a loader bucket to a loader arm of a tractor. The pivot pin assembly includes a cylindrical pin having spaced-apart retaining sleeves which capture a sleeve bearing therebetween. The retaining sleeves engage the bucket bracket assembly and the bearing engages the loader arm assembly. Flanges on one retaining sleeve engage the bucket bracket assembly to restrict axial movement of the pin in one direction. A cover plate, secured to the bucket bracket over the flanges, restricts axial movement of the pin in the other direction. The flanges define two spaced-apart sides which are retained in a channel on the cover plate to prevent rotational movement of the pin with respect to the loader bucket. The pivot pin assembly may be removed by detaching the cover plate and pulling the pin from the bucket bracket assembly and the loader arm assembly.

Pivot pin assembly

A hinge pin construction including a pin adapted to journal an arm or the like, an annular wedge member associated with one end of the pin, an axially extending lubricant passage in at least one of the wedge member and the pin for directing lubricant to the interface of the pin and an arm journalled thereon, a plug removably closing the axially outer end of the passage and a collet received on the wedge member and including a bolt securing the collet to the pin. An axially extending passage is located in the collet and is of a size greater than that of the plug whereby the plug may be removed from the lubricant passage. An additional plug is employed for selectively closing the collet passage and a keying device is employed for precluding assembly of the collet to the wedge member except with the collet and lubricating passages aligned to allow the introduction of lubricant into the lubricant passage without removing the collet.

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Aurora, IL, United States of America

Lowell P Iverson